I want to make a piechart with JFreeChart and use variables that I got out of an XML-File
Methode Class:
package Statistik;
import xmlModul.XmlLoader;
public class Data {
XmlLoader xml = new XmlLoader();
int deleted;
int created;
int edited;
public int getDeleted() {
return deleted;
}
public void setDeleted(int deleted) {
this.deleted = deleted;
}
public int getCreated() {
return created;
}
public void setCreated(int created) {
this.created = created;
}
public int getEdited() {
return edited;
}
public void setEdited(int edited) {
this.edited = edited;
}
public void setDeletedValue(String s) {
xml.setStringByTagName("Deleted", "Statistik", s);
}
public void setCreatedValue(String s) {
xml.setStringByTagName("Created", "Statistik", s);
}
public void setEditedValue(String s) {
xml.setStringByTagName("Edited", "Statistik", s);
}
public int getDeletedValue() {
return Integer.parseInt(xml.getStringByTagName("Deleted", "Statistik"));
}
public int getCreatedValue() {
return Integer.parseInt(xml.getStringByTagName("Created", "Statistik"));
}
public int getEditedValue() {
return Integer.parseInt(xml.getStringByTagName("Edited", "Statistik"));
}
public void setAll(String d, String c, String e){
xml.setStringByTagName("Deleted", "Statistik", d);
xml.setStringByTagName("Created", "Statistik", c);
xml.setStringByTagName("Edited", "Statistik", e);
}
}
Button call in statistic class:
DefaultPieDataset pieDataset = new DefaultPieDataset();
Data data = new Data();
int created = data.getCreatedValue();
int deleted = data.getDeletedValue();
int edited = data.getEditedValue();
pieDataset.setValue("one", new Integer(15));
pieDataset.setValue("two", new Integer(40));
pieDataset.setValue("created", new Integer(created));
pieDataset.setValue("edited", edited);
pieDataset.setValue("deleted", deleted);
JFreeChart chart = ChartFactory.createPieChart("Pie Chart", pieDataset, true, true, true);
ChartFrame frame = new ChartFrame("Pie Chart", chart);
frame.setSize(600, 800);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
Before I tried to do it with variables and I only used statements like
pieDataset.setValue("one", new Integer(15));
and it worked. But now that I try to use the int variables deleted, edited and created it doesn't work in any way.
This is my error output:
Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: " 0 "
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:569)
at java.lang.Integer.parseInt(Integer.java:615)
at Statistik.Data.getCreatedValue(Data.java:65)
at Statistik.StatistikWithFreeChart_USE_THIS.jButton1ActionPerformed(StatistikWithFreeChart_USE_THIS.java:65)
at Statistik.StatistikWithFreeChart_USE_THIS.access$000(StatistikWithFreeChart_USE_THIS.java:8)
at Statistik.StatistikWithFreeChart_USE_THIS$1.actionPerformed(StatistikWithFreeChart_USE_THIS.java:26)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2739)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
at java.awt.EventQueue.access$400(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:697)
at java.awt.EventQueue$3.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:719)
at java.awt.EventQueue$4.run(EventQueue.java:717)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Edit: I tried to set the data with
data.setAll("10", "20", "5");
and it worked but when I use this method in another button, it won't take the values out of this so I need to set it in the method but I have to take it out of the xml.
The error message tells you all you need to know: there are blanks in your input strings, so the strings cannot be parsed to integers.
So, in your functions getDeletedValue(), getCreatedValue() and getEditedValue(), you need to do a trim() which removes these unnecessary blanks. Example:
public int getCreatedValue() {
return Integer.parseInt(xml.getStringByTagName("Created", "Statistik").trim());
}